NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 415
BOOST SUBSCRIBERCO L.L.C. 1
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2015-04-20 415-650-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC MT-EV CA
2015-04-16 415-965-1XXX 1000–1999Assigned IP HORIZON LLC 515J STNSN-BLNS CA
2015-04-13 415-304-0XXX 0000–0999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2015-04-13 415-304-1XXX 1000–1999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2015-04-13 415-304-2XXX 2000–2999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2015-04-13 415-304-3XXX 3000–3999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2015-04-13 415-304-4XXX 4000–4999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2015-04-13 415-304-5XXX 5000–5999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2015-04-13 415-304-6XXX 6000–6999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2015-04-13 415-304-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2015-04-06 415-855-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SAUSALITO CA
2015-03-26 415-604-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2015-03-26 415-650-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2015-03-20 415-855-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2015-03-20 415-855-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2015-03-20 415-855-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2015-03-20 415-966-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BELVEDERE CA
2015-03-20 415-966-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BELVEDERE CA
2015-03-20 415-966-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BELVEDERE CA
2015-03-09 415-604-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2015-03-09 415-604-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2015-03-09 415-604-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2015-03-09 415-996-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 IGNACIO CA
2015-02-27 415-934-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J SNFC CNTRL CA
2015-02-24 415-510-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2015-02-24 415-510-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2015-02-24 415-510-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2015-02-24 415-872-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2015-02-19 415-936-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CORTEMADRA CA
2015-02-19 415-936-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CORTEMADRA CA
2015-02-19 415-936-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CORTEMADRA CA
2015-02-18 415-477-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2015-02-18 415-510-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2015-02-17 415-510-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2015-02-17 415-510-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2015-01-23 415-510-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SNFC CNTRL CA
2015-01-23 415-604-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2015-01-23 415-604-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2015-01-23 415-604-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2015-01-23 415-604-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2015-01-20 415-917-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2015-01-20 415-917-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2015-01-08 415-477-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2014-12-31 415-510-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2014-12-31 415-510-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2014-12-31 415-936-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CORTEMADRA CA
2014-12-09 415-510-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SNFC CNTRL CA
2014-12-05 415-849-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2014-12-05 415-849-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2014-12-03 415-650-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC MT-EV CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.